A student has written what he thinks are some ground-state electron configurations. Which ones have something wrong

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A student has written what he thinks are some ground-state electron configurations. Which ones have something wrong with them? What is wrong?

(a) 1s22p63s1 

(b) 1s22s63s23p64s24p6

(c) 2s22p63s23p64s23d7 

(d) 1s22s22p73s33p6

(e) 1s22s22p53s1

(f) 1s22s22p63s23p64s23d104p65s14d4 [This is the transition metal niobium, which violates the four-block electron-assignment rules, so be careful.]

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Related Book For  answer-question

Introductory Chemistry Atoms First

ISBN: 9780321927118

5th Edition

Authors: Steve Russo And Michael Silver

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